'use strict'
// * 打包时的配置文件

// 导入 path 模块
const path = require('path')
// * 加载配置文件  ————> settings.js
const defaultSettings = require('./src/settings.js')

// * 将传入的路径变成 绝对路径
function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = defaultSettings.title || 'vue Admin Template' // page title

// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following methods:
// port = 9528 npm run dev OR npm run dev --port = 9528
// * 设置端口号
const port = process.env.port || process.env.npm_config_port || 9528 // dev port

// * vue-cli 脚手架相关的配置
// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  // * 设置打包后的静态资源目录，可以访问的方式
  // * '/' 以服务器的方式打开里面的静态文件
  // * './' 可以使用相对路径的方式访问里面的静态资源

  publicPath: process.env.NODE_ENV === 'development' ? '/' : '/',
  // * 打包输出目录
  outputDir: 'dist',
  // * 静态资源的输出目录 静态资源（js，css，img，fonts）的（相当于 outputDir 的）目录
  assetsDir: 'static',
  // * 是否开启 eslint 检查
  lintOnSave: process.env.NODE_ENV === 'development',

  // * 关闭 map 文件
  productionSourceMap: false,
  // * 服务器的相关配置
  devServer: {
    // * 设置端口号
    port: port,
    // * 自动打开浏览器
    open: true,
    // * eslint 检查代码出错或者警告，是否在浏览器中显示
    overlay: {
      warnings: false,
      errors: true
    },
    proxy: {
      '/api': {
        // * 我们要代理的真实接口地址
        // target: 'http://ihrm-java.itheima.net'
        // target: 'http://60.205.245.110:3000' // 同学的
        // target: 'http://192.168.81.134:3000' // 老师的
        target: 'http://192.168.81.170:3000'
      }
    }
    // * 在启动服务器之前加载 mock 服务
    // before: require('./mock/mock-server.js')
  },
  // * wabpack 的对象配置
  configureWebpack: {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    externals: {
      /**
       * externals 对象属性解析。
       *  基本格式：
       *     '包名' : '在项目中引入的名字'
       *
     */
      // 'vue': 'Vue',
      'element-ui': 'ElementUI',
      'xlsx': 'XLSX'
    },
    resolve: {
      alias: {
        '@': resolve('src')
      }
    }
  },
  // * wabpack 的函数配置
  chainWebpack(config) {
    // ! 取消 log 打印
    config.optimization.minimizer('terser').tap((args) => {
      args[0].terserOptions.compress.drop_console = true
      return args
    })
    // it can improve the speed of the first screen, it is recommended to turn on preload
    config.plugin('preload').tap(() => [
      {
        rel: 'preload',
        // to ignore runtime.js
        // https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/cli-service/lib/config/app.js#L171
        fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],
        include: 'initial'
      }
    ])

    // when there are many pages, it will cause too many meaningless requests
    config.plugins.delete('prefetch')

    // set svg-sprite-loader
    config.module.rule('svg').exclude.add(resolve('src/icons')).end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()

    config.when(process.env.NODE_ENV !== 'development', (config) => {
      config
        .plugin('ScriptExtHtmlWebpackPlugin')
        .after('html')
        .use('script-ext-html-webpack-plugin', [
          {
            // `runtime` must same as runtimeChunk name. default is `runtime`
            inline: /runtime\..*\.js$/
          }
        ])
        .end()
      config.optimization.splitChunks({
        chunks: 'all',
        cacheGroups: {
          libs: {
            name: 'chunk-libs',
            test: /[\\/]node_modules[\\/]/,
            priority: 10,
            chunks: 'initial' // only package third parties that are initially dependent
          },
          elementUI: {
            name: 'chunk-elementUI', // split elementUI into a single package
            priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
            test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
          },
          commons: {
            name: 'chunk-commons',
            test: resolve('src/components'), // can customize your rules
            minChunks: 3, //  minimum common number
            priority: 5,
            reuseExistingChunk: true
          }
        }
      })
      // https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
      config.optimization.runtimeChunk('single')
    })
  }
}
